Manufacture of expansible finger and other small rings.



A. EMRIOH. 1 MANUFACTURE OF EXPANSIBLE FINGER AND OTHER SMALL RINGS.

APPLICATION FILED MAB. 8, 1911.

Patented Au s', 1911.

wwwlm 1 Rift ML (Em 01001 2w WW nsra rnr @FEW.)

ALFRED EMBICH, OF PFORZHEIM, GERMANY.

MANUFACTURE OFEXPANSIBLE FINGER AND OTHER: SMALL RINGS.

To all whom tt may concern:

and resident of Pforzheim, in the Grand Duch oi 'Baden, Gern'ianv, with the postol'liee address llaumstrasse 22, have lnvented new and-useful Improvements in theMannfact-Lire of Expansible Fingeiwand other Small Rings, of which the following is a specification.

This invention relates to finger rings and especially to expanding rings constructed on the principle of anexpanding bracelet.

ACCOI ZlIU tOiLhlS invention the screws or bolts for. holding together and spacing apart the links are formed from a length. of threaded wire,the ends of which are cut off after it has'been screwed into position.

The accompanying drawings show a finger ring constructed in accordance with this invention.

Figure 1 is an elevation in partial section. Fig. 2 is a section through part ofv the ringat rightangles to the plane ofFig. 1. Fig. 3 1s a PGISPBCUVG'VlGW of an intermediate member.

Fig. 5 is a view of oneanember with the length of threaded wire passing through it. It Wlll beseenby Fig. 1 that the ring 1s formed as a link chain of pairs of links a link a.

and b of which-the link a has two plates inclosing the link 71. Gne of the ends of the links a is convex in shape, as shown by a while the-otherone. a. is concave, so as to fit one into the other. The link I) (Fig. 3) is guided by means of. one or two lateral studs 0 which project from the sides thereof and engage in corresponding grooves in the plates of the link (awhile the slot (Z is guided on a pin e fixed in the plates of the A spring 7 is arranged in the slot (l between the studs 0 of the link Z2 and the inner end of the grooves o of the link a to draw the links aaud b together-'elastically.

time as guides and jointing This spring 7 preferably of a flat form, as shown by Fig. 2. so as to project beyond the sides of the link 7) into the groove 0 of the plates of the link (1. thus serving; as an ad ditional guiding means for the link I). A

difficulty is encountered in making this kind of chain link in the small sizes needed for finger-rings. The two plates 1/. are connected by pins 0 (Fig. 2) which serve at the same bolts for the Specification of Letters Patent.

Application filed March 8, 1911.

Fig. 4 represents a per-- U011 of the ring 1n the expanded condition, partly in elevation and partly 1n -section.-.

Patented An 8, 1911.

Serial No. 613,155.

links I). The attachment of these bolts gives Be it known that I, ALFRED Eanucmmam. ufacturer. a sub ect of the German Emperor,

rise to considerable.difliculty since they must be suflicientlylow in cost on the one hand,

and on the-other an accurate spacing of the plates 0- fronrone another is essential, and finally the ends of the bolts must'not projeet; they must in fact be perfectly invisible tothe eye when the outside has been coated with. metal. The presence of the small springs false increasesthe difiiculty of the work, more especially asthe employment of .any.-l1e atthat would. destro v' their springiness is precluded. These diliiculties are so i great 1n the. case of such small h nged oint-s as needed for finger rings, for instance,

.that no expanding fingerrings of the afore said. kind have yet'been made.

1 The new .method of connection can of coursealso be applied to other rings that are notexaetly finger rings but require the same finework. i

According to the present invention the two plates are secured together a special way by the aid of screw bolts. The use of separate small serewskhowever, 1s impracticable owing to. the. ditticulty of making and -.handlin them. .Gonse uen'tl thebolts are made in the form of threaded wires which after being inserted in the holes previousl bored, in the plates, are cut oil on the outside and can easily be filed down smooth. The method articularly adopted is to use for the bolts a wire, that is considerably harder thant-he material of the chain links, this wirev being used. to. out the tine female thread in. the chain link. Apart from greater ease in. handling;' the wire, this method has thev advantagethat the rotation of the wire enables the distance between the checks to be nicely adjusted; When the avire has cut its way in, it is cut olt at each side by cutting pincers, and the two ends are filed smooth.

. lVhat- I claim and desire to secure by tersPat-ent is:

1. In a the combination of a plurality of links formed with a pair of plates, slotted links engaged by the plates. pins let- .fixed in the plates and passing through the fixed in the plates and passing through the In testimony, that I claim-the foregoing as slots of the slotted links, each slotted link 'my invention, I have signed my name in 1Q having a lug on each face in alinement'with presence of two Witnesses, this 25th day of the slot thereof, said plates being provided February 1911.

with grboves for receiving said lugs, and a ALFRED EMRICH. spiing in each slot and projecting into said Witnesses: grooves of the plates for drawing said links ERNEST ENTENMANN,

together, substantially as described. F RIDA KLAIBER. 

